Noninjection Synthesis of CdS and Alloyed CdSxSe1−xNanocrystals Without Nucleation Initiators

Noninjection Synthesis of CdS and Alloyed CdSxSe1−xNanocrystals Without Nucleation Initiators

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Abstract CdS and alloyed CdSxSe1−x nanocrystals were prepared by a simple noninjection method without nucleation initiators.Oleic acid (OA) was used to stabilize the growth of the CdS nanocrystals.The size of the CdS nanocrystals can be tuned by changing the OA/Cd molar ratios.On the basis of the successful synthesis of CdS nanocrystals, alloyed CdSxSe1−x Chair nanocrystals can also be prepared by aquarium simply replacing certain amount of S precursor with equal amount of Se precursor, verified by TEM, XRD, EDX as well as UV–Vis absorption analysis.

The optical properties of the alloyed CdSxSe1−x nanocrystals can be tuned by adjusting the S/Se feed molar ratios.This synthetic approach developed is highly reproducible and can be readily scaled up for potential industrial production.